“[W]e should be carefully monitoring the oceans after what is certainly the largest accidental release of radioactive contaminants to the oceans in history,” marine chemist Ken Buesseler said last spring.

Instead, the US Environmental Protection Agency halted its emergency radiation monitoring of Fukushima’s radioactive plume in May 2011, three months after the disaster began. Japan isn’t even monitoring seawater near Fukushima, according to a September 28, 2015, story in “The Ecologist.”

The amount of cesium in seawater that Buesseler’s researchers found off Vancouver Island is nearly six times the concentration recorded since cesium was first introduced into the oceans by nuclear bomb tests (halted in 1963). This stunning increase in Pacific cesium shows an ongoing increase. The International Business Times (IBT) reported last November 12 that Dr. Buesseler found the amount of cesium-134 in the same waters was then about twice the concentration left in long-standing bomb test remains.

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Dr. Buesseler, at the Woods Hole Oceanographic Institution, announced his assessment after his team found that cesium drift from Fukushima’s three reactor meltdowns had reached North America. Attempting to reassure the public, Buesseler said, “[E]ven if they were twice as high and I was to swim there every day for an entire year, the dose I would be exposed to is a thousand times less than a single dental X-ray.”

This comparison conflates the important difference between external radiation exposure (from X-rays or swimming in radioactively contaminated seawater) and internal contamination from ingesting radioactive isotopes, say, with seafood.

Dr. Chris Busby of the Low Level Radiation Campaign in the UK explains the distinction this way: Think of the difference between merely sitting before a warm wood fire on one hand, and popping a burning hot coal into your mouth on the other. Internal contamination can be 1,000 times more likely to cause cancer than the same exposure if it were external, especially for women and children. And, because cesium-137 stays in the ecosphere for 300 years, long-term bioaccumulation and bioconcentration of cesium isotopes in the food chain – in this case the ocean food chain – is the perpetually worsening consequence of what has spilled and is still pouring from Fukushima.

The nuclear weapons production complex is the only other industry that has a record of deliberate whole-earth poisoning. Hundreds of tons of radioactive fallout were aerosolized and spread to the world’s watery commons and landmasses by nuclear bomb testing. The same people then brought us commercial nuclear power reactors. Dirty war spawns dirty business, where lying comes easy. Just as the weapons makers lied about bomb test fallout dangers, nuclear power proponents claimed the cesium spewed from Fukushima would be diluted to infinity after the plume dispersed across 4,000 miles of Pacific Ocean.

Today, globalized radioactive contamination of the commons by private corporations has become the financial, political and health care cost of operating nuclear power reactors. The November 2014 IBT article noted that “The planet’s oceans already contain vast amounts of radiation, as the world’s 435 nuclear power plants routinely pump radioactive water into Earth’s oceans, albeit less dangerous isotopes than cesium.”

Fifty million Becquerels of cesium per-cubic-meter were measured off Fukushima soon after the March 2011 start of the three meltdowns. Cesium-contaminated Albacore and Bluefin tuna were caught off the West Coast a mere four months later; 300 tons of cesium-laced effluent has been pouring into the Pacific every day for the four and a half years since. On September 14, 2015, the Japanese government openly dumped 850 tons of partially-filtered but tritium-contaminated water into the Pacific. This latest dumping portends what it will try to do with thousands of tons more now held in shabby storage tanks at the devastated reactor complex.

Officials from Fukushima’s owners, the Tokyo Electric Power Co., have said leaks from Fukushima disaster with “at least” two trillion Becquerels of radioactivity entered the Pacific between August 2013 and May 2014 – and this nine-month period isn’t even the half of it.

The fact that Fukushima has contaminated the entirety of the Pacific Ocean must be viewed as cataclysmic. The ongoing introduction of Fukushima’s radioactive runoff may be slow-paced, and the inevitable damage to sea life and human health may take decades to register, but the “canary in the mineshaft” is the Pacific tuna population, which should now also be perpetually monitored for cesium.

Last November Buesseler warned, “Radioactive cesium from the Fukushima disaster is likely to keep arriving at the North American coast.” Fish eaters may want to stick with the Atlantic catch for 12 generations or so.

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